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dc.contributor.authorRasiq, K.T.
dc.contributor.authorKurian, S.
dc.contributor.authorKarapurkar, S.G.
dc.contributor.authorNaqvi, S.W.A.
dc.date.accessioned2016-06-14T06:46:47Z
dc.date.available2016-06-14T06:46:47Z
dc.date.issued2016
dc.identifier.citationEstuarine, Coastal and Shelf Science, vol.176; 2016; 91-101
dc.identifier.otherno
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4974
dc.description.abstractSedimentary pigments, carbon and nitrogen content and their stable isotopes were studied in three short cores collected from the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (EAS). Nine pigments including chlorophyll a and their degradation products were quantified using High Performance Liquid Chromatography (HPLC). Astaxanthin followed by canthaxanthin and zeaxanthin were the major carotenoids detected in these cores. The total pigment concentration was high in the core collected from 500 m water depth (6.5 microgg<sup>-1</sup>) followed by 800 m (1.7 microgg<sup>-1</sup>) and 1100 m (1.1 microgg<sup>-1</sup>) depths respectively. The organic carbon did not have considerable control on sedimentary pigments preservation. Pigment degradation was comparatively high in the core collected from the 800 m site which depended not only the bottom dissolved oxygen levels, but also on the faunal activity. As reported earlier, the bottom water dissolved oxygen and presence of fauna have good control on the organic carbon accumulation and preservation at Indian margin OMZ sediments. The C/N ratios and delta13C values for all the cores conclude the marine origin of organic matter and delta15N profiles revealed signature of upwelling associated denitrification within the water column
dc.language.isoen
dc.publisherElsevier
dc.relation.requiresEstuar_Coast_Shelf_Sci_176_91.jpg
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2016] Elsevier
dc.subjectCHEMISTRY AND BIOGEOCHEMISTRY
dc.subjectCHEMISTRY AND BIOGEOCHEMISTRY
dc.subjectGEOLOGY AND GEOPHYSICS
dc.subjectCHEMISTRY AND BIOGEOCHEMISTRY
dc.titleSedimentary pigments and nature of organic matter within the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (Indian margin)
dc.typeJournal Article


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